At 12:43 p.m. on November 12, 2026, blockchain gaming project MapleStory Universe announced on X that it was beginning emergency maintenance after detecting unauthorized access by a third party to some of its off-chain server infrastructure.
Initial investigations showed that neither the project’s underlying blockchain architecture nor its smart contracts had been affected. On-chain ledger data and wallet balances showed no asset transfers or theft. The project emphasized that users’ wallet private keys are never uploaded to the MSU system, meaning core assets were not exposed to risk.
The data exposed in this incident was limited to some user records created after 07:26 on November 5, 2026. This included wallet addresses, nicknames, avatars, login histories, some email addresses, and linked social media account information, as well as OpenAPI call logs and transaction service activity records. Notably, sensitive information such as real names, phone numbers, physical addresses, KYC verification documents, and payment card details did not fall into the attackers’ hands.
#OnChain
Initial investigations showed that neither the project’s underlying blockchain architecture nor its smart contracts had been affected. On-chain ledger data and wallet balances showed no asset transfers or theft. The project emphasized that users’ wallet private keys are never uploaded to the MSU system, meaning core assets were not exposed to risk.
The data exposed in this incident was limited to some user records created after 07:26 on November 5, 2026. This included wallet addresses, nicknames, avatars, login histories, some email addresses, and linked social media account information, as well as OpenAPI call logs and transaction service activity records. Notably, sensitive information such as real names, phone numbers, physical addresses, KYC verification documents, and payment card details did not fall into the attackers’ hands.
#OnChain
